我在哪里可以找到关于编写音频 DSP 滤波器(低通等)的好的教程? [英] Where can I find good tutorials on writing audio DSP filters (lowpass, etc)?

问题描述

我最近对学习如何在 AS3 中实现各种音频过滤器非常感兴趣.通过直觉猜测(并受到电容器的启发)，我设法创建了似乎是一阶高通滤波器的东西，但我不知道如何以受控方式设置其频率(或 Q).

I've recently become very interested in learning how to implement various audio filters in AS3. By intuitive guessing (and inspired by capacitors), I've managed to create what seems to be a 1st order high-pass filter, but I have no idea how to set its frequency (or Q) in a controlled way.

所以我想学习如何从头开始编写参数二阶/四阶低通、高通、带通滤波器.而且我不是很数学.是否有任何实用、简单的教程或教科书可以帮助解决这个问题?

So I'd like to learn how to write parametric 2nd/4th order low-pass, hi-pass, bandpass filters from scratch. And I'm not very mathsy. Any practical, straightforward tutorials or textbooks out there which could help with this?

部分归功于可读源代码(在 as3/c 等中)，代替教程......(！)

Partial credit for readable source code (in as3/c,etc), in lieu of a tutorial... (!)

找到了一个很棒的网站 www.musicdsp.org，里面有很多很棒的代码片段，大部分是用 c/c++ 编写的.

Found a great site, www.musicdsp.org, with heaps of awesome code snippets, mostly in c/c++.

推荐答案

您真正想从 MusicDSP 获得的链接是 http://www.musicdsp.org/files/Audio-EQ-Cookbook.txt

The link you really want from MusicDSP is http://www.musicdsp.org/files/Audio-EQ-Cookbook.txt

我还建议您学习里昂的了解数字信号处理.不过，我有点偏见，因为我是第二版的审稿人(但我认为最近出了第三版).

I also recommend getting Lyon's Understanding Digital Signal Processing. I am a bit biased, though, since I was a reviewer for the second edition (but I think a third edition came out recently).

另请查看 Udo Zölzer 的 Digital Audio Signal Processing 和 DAFX:Digital Audio Effects.

Also check out Digital Audio Signal Processing and DAFX:Digital Audio Effects, both by Udo Zölzer.

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